Political map of Europe & the Mediterranean 28 January 198 (Severus’ Parthian Campaign): Following his defeat of Clodius Albinus (197), Septimius Severus quickly returned east to attend to the Parthian (Parthian Empire) clients of Adiabene and Araba (Kingdom of Araba), who had been making incursions into Roman territory. After defeating both these states—although unable to capture Araba’s capital Hatra—Severus sailed down the Euphrates, sacking the Parthian capital Ctesiphon (Battle of Ctesiphon (198)) in January 198.